Organization scale of photospheric magnetic imbalance in coronal holes

IF 2.1 4区 综合性期刊 Q2 MULTIDISCIPLINARY SCIENCES Rendiconti Lincei-Scienze Fisiche E Naturali Pub Date : 2023-09-13 DOI:10.1007/s12210-023-01185-x
Matteo Cantoresi, Francesco Berrilli, Fabio Lepreti
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Abstract

Abstract To investigate the statistical properties of the photospheric magnetic fields underlying coronal holes (CHs) and “normal” coronal regions a classical technique, the signed measure, is used. This technique allows to characterize the scaling behavior and the topology of sign-oscillating magnetic structures in selected regions of line of sigth (LoS) magnetograms recorded by the Heliosismic Magnetic Imager on board of the Solar Dynamic Observatory (SDO/HMI). To this end we have compared the properties of the photospheric magnetic field underlying 60 CHs and 60 non-coronal holes (NCHs). In particular, in addition to having studied distributions and momenta of photospheric magnetic fields associated to the selected regions, we have performed the sign singularity analysis computing the cancellation functions of the highly fluctuating photospheric magnetic fields. We have found that photospheric magnetic fields associated to CHs are imbalanced in the sign and that this imbalance emerges mainly at the supergranular scales.

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日冕洞光球磁不平衡的组织尺度
摘要为了研究日冕洞(CHs)和“正常”日冕区域下的光球磁场的统计特性,采用了经典的符号测量方法。该技术允许表征尺度行为和符号振荡磁结构的拓扑结构在选定区域的视线线(LoS)磁图记录由太阳动力天文台(SDO/HMI)板上的日冕磁成像仪。为此,我们比较了60个日冕洞和60个非日冕洞的光球磁场特性。特别地,除了研究与选定区域相关的光球磁场的分布和动量外,我们还进行了符号奇点分析,计算了高度波动的光球磁场的抵消函数。我们发现与CHs相关的光球磁场在信号中是不平衡的,这种不平衡主要出现在超颗粒尺度上。
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来源期刊
Rendiconti Lincei-Scienze Fisiche E Naturali
Rendiconti Lincei-Scienze Fisiche E Naturali MULTIDISCIPLINARY SCIENCES-
CiteScore
4.10
自引率
10.00%
发文量
70
审稿时长
>12 weeks
期刊介绍: Rendiconti is the interdisciplinary scientific journal of the Accademia dei Lincei, the Italian National Academy, situated in Rome, which publishes original articles in the fi elds of geosciences, envi ronmental sciences, and biological and biomedi cal sciences. Particular interest is accorded to papers dealing with modern trends in the natural sciences, with interdisciplinary relationships and with the roots and historical development of these disciplines.
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